Spring-hinge



(NoModelL) F. N. KELSEY.

UNITS e TATE PATENT OFFICE. 1

FRANK. N. KELSEY, OF FLORENCE, ASSIGNOR OF ONE-HALF 'ro Carmen L.

' t LOOMIS, OF NORTHAMPTON, MASSACHUSETTS.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 449,366, dated March 31, 1891, Application filed October 31, 1890. erial No. 369,936. (No model.)

To aZZ whom it'may concern.-

Be it known that I, FRANK. N. KELsEY, a citizen of the United States, residing at Florence, in the county of Hampshire and State of Massachusetts, have invented new and useful Improvements in Spring-Hinges, of which the following is a specification.

This invention relates to improvements in spring-hinges, the same being especially applicable for the hanging of doors and blinds and capable of exerting such a spring action that the door or blind may be maintained in any one of several positions, the same, nevertheless, being capable of having its position changed on the proper application thereto of such a force as to overcome the resistance exerted thereon by the spring.

Under the improvements in its construction the spring-hinge is of unusual simplicity and durability, and easy of application; and the invention consists in the construction and combination or arrangements of parts, all substantially as will hereinafter more fully appear, and be set forth in the claims.

Referring to the accompanying drawings, in which the present invention is illustrated, Figure 1 is a horizontal section through a portion of a window-casin g and of a blind, showing in plan view the present improved hinge as applied between the said casing and blind. Fig. 2 is a plan view of the spring-containing casing or socket which also forms one member of the hinge. Fig. 3 is aperspective view of the bushing for the hinge. Fig. at is a sectional view of said socketed hinge member, taken on the line at 4: of Fig. 1. Fig. 5 is in part a section and in part a plan view of the improved hinge with one element illustrated in the hinge of the preceding figures dispensed with. Fig. 0 is a perspective view of the form of spring which may be advantageously employed in the hinge of the latter form.

In the drawings, A indicates a portion of the window-casing having the usual rabbet or rest 00.

B represents the blind, and G the hinge, as a whole, uniting said casing and blind and forming the medium of support for the latter upon the former.

The hinge essentially comprises the two members, one constituted by the spring-coir taining casing or socket (4, provided at its outer end with the separated ear-pieces or lugs Z) I), and the other constituted by the bracket 0, pivotally connected to said first member by the pin (1. The socket or casing member a is in the form of a thin cylindrical shell having a closed bottom, butopen at its top, and is let into a correspondingly-formed opening bored therefor in the casing, and is provided at its outer portion with the externally-projected flanges a a. The said earpieces Z2 I) stand at opposite sides of the opening in the upper end of said casing and are of hooked form, substantially as shown at c, it being noted that the overhanging portion 6 of the hook is formed full, so that when the hinge is in its application and position, as shown in Fig. 1, the said full portion has a dip or depression inside of the plane indicated by the dotted line to to, Fig. 1, parallel with the bearing of the blind on the rabbetseat a: therefor, and the opposing portion e of the hook-forming lug being also formed, substantially as shown, with a separation between it and the part c about equal to the diameter of the pin, there is no liability under usual conditions of the pin and bracket 0, which carries the same, escaping from its engagement with the said hook-lugs of the casing member a when the blind is closed or when swung away back against the side of the building, although when the blind and bracket are swung into the position indicated by the dotted lines in Fig. 1 the pin may be disengaged from the hook, it, however, then being necessary to overcome the bindingforce which is exerted on the bracket and pin thereof by the springfiapplied as shown, and the manner of which application will be stated. The end of the bracket is formed rounded concentric ally with the pivot-pin d, but has at different intervalsin its rounded surface the rests or flats l and 2 and 011 its back the one 3.

The spring f, let into the casing and resting by one end on the closed bottom thereof, exerts a forcing action outwardly upon the portion of the bracket which is between the month of the casing and the pivot (Z, the tendency of which is to hold the bracket and part supported thereon in whatever position it may be left, but with the greater certainty when one or another of the Hat portions 1, 2, or 3 are borne upon by the spring, for then,in order that the bracket may be swung, it must exert a cam action against the spring to further compress the latter.

It is preferred to provide a bushing for the end of the spring to afford a flat bearing for resisting the contact of the bracket-extremity, and one in the form shown at g is an advantageous and practical one, the same consisting in the hollow cylindrical part with a tlat closing head at one end, the extremity of the spring entering the bushing and bearing against the inner side of its head. The said bushing is movable axially relative to the casing a, and is limited in its outward movement by the stop-lugs Z, bearing against the circular ledge 7:, formed on the inner wall of the casing near the mouth thereof. The lodge is vertically grooved, as atj, to permit the entrance there below of the said stop-l u gs, which after being passed through said grooves are disposed out of line therewith. In lieu, however, of a bushing for the spring independently provided, the end bearing portion thereof of the desired flat form may be constituted by giving to the extremity of the wire one or more return-bends, the same being disposed in a plane substantially at right angles to the axis of the spiral spring, as shown at m in Figs. 5 and 6,

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

l. A spring-hinge consisting of two members a and c, the one comprisingthe socket-ed casing open at its outer end and provided there-at with the hook-shapedlugs e 6, standing at opposite sides of the socket, the other member 0 carrying the pin d for engaging said hook-lugs, and the spiral spring disposed in said casing and exerting an outward foreing action in relation to the member 0, substantially as described.

2. A spring-hinge consisting of two members a and c, the one comprising the casingsocket open at its one end and provided at opposite sides of the month with lugs and internally provided with the grooves j j and .the other member provided with the flat portions 1, 2, and 3 and the pivot-forming pin (1, the bushing g, having the studs, and the spring, all combined for operation substantially as described.

FRANK. N. KELSEY.

Witnesses:

WM. S. BELLOWS, G. M. CHAMBERLAIN. 

